Carburetor

ABSTRACT

A carburetor for providing a fuel-air mixture to an internal combustion engine in such a manner as to minimize pollution by the engine.

United States Patent 11 1 1111 3,847,125

Malherbe 1 Nov. 12, 1974 1 CARBURETOR 2,886,020 5/1959 .w ian31.11.221.91 13 2,977,205 3/1961 Austin. 123/141 inVentOrZ AlfredAndre-Malherbe, rue Arpaiu I l I l I l Pasteur W321i? 59119, France3,077,391 2 1963 Gufi'ra 123/141 3,085,869 4/1963 Benes 123/141 Filed1973 3,371,914 5/1968 Walker 123/97 13 [21] App]. N0.: 327,085 3,395,8998/1968 Kopu 261/79 R 3,437,467 4/1969 Jacohus 1 123/141 3,544,29012/1970 Larson 123/141 1 1 F g App a P y Da a 3,661,367 5/1972 Mennesson123/97 B .111n.27, 1972 France 72.2727 3,677,526 7/1972 Pierim 133/97 B52 us. c1. 123/119 A, 123/122 A, 123/97 13, Primary E-wminercharlesMyhre 123 141 2 55 79 R, Assistant ExaminerR. H. Lazarus Z1 G 19 2 1/14;2 1/142 Attorney, Agent, or Firm-Norman S. Blodgett; Gerry 511 1111. CL;F1T2F25/06 A. Blodgett [58] Field of Search 123/97 B, 122 AA, 141,

123/119 A; 26l/D1G. 55, 79 R 1 1 ABSTRACT A carburetor for providing afuel-air mixture to an in- [56] References Cited terna1 combustionengine in such a manner as to mini- UNITED STATES PATENTS mize pollutionby the engine.

1,392,473 10/1921 81111.. 261/D1G. 55 17 Claims, 5 Drawing FiguresPATENTEDNHY 12 m 3.847; 125

sum 10$ 2 PATENTEDNIJV 12 1914 c1847; 125

SHEET 2 OF 2 CARBURETOR BACKGROUND OF THE INVENTION The general idea ofthis invention is to supply a combustible mixture to internal combustionengines, particularly automobile engines, which should, from now on,comply with the strict standards of the anti-pollution laws. Fuel supplyto internal combusition engines is normally carried out by one or morecarburetors or by a direct or indirect injection device whose purpose isto mix fuel with the intake air in proper proportion for operations ofthe engine. An ideal mixture for all engines can be realized only byemploying complex mechanisms which, as a consequence, are costly,require delicate adjustment and are prone to go out of adjustment withnormal usage. From a practical standpoint, then, the fuel mixture israrely optimum for the operation of the engine, thus the exhaust gassescontain pollutants, which are not insignificant and therefore important,such as oxides of carbon, various oxides of nitrogen, unburnedhydrocarbon, also tetraethyl of lead and other additives which areincorporated in the fuel but do not burn. In other words, to reduce theill-fated consequences of this emission of pollutants, strictregulations have been recently introduced with which all futureautomobiles will have to comply. Now, very few of the anti-pollutionsystems yet devised meet the requirements of the new regulations, andthe rare few that do, have the common drawbacks of being costly to makeand use, and they appreciably effect performance or fuel consumption.Therefore, the object of this invention is a method and application forsupplying (fuel) to an internal combustion engine which is not onlyeasily and inexpensively accomplished, but in addition meets the variousexisting or future regulations as numerous official tests have proven.This invention provides the following fundamental functions: Furnish theengine, while cruising or accelerating, with a dry, automatically,proportioned combustible mixture by centrifugal action as a result ofits speed, with recovery and eventual recycling of excess fuel andelimination of entrapped impurities. With the engine throttled down,furnish the engine with only a separately prepared combustible gasmixture brought about by mixing the fuel in fixed proportions in a smallflow of primary air, then heating of the mixture, for example, by theexhaust gasses, and finally admission of a prescribed flow of secondaryair. During deceleration, to cut off all supply of combustible mixtureto the engine so, therefore, the intake is connected to the exhaust.

In corollary manner, this invention includes fundamentally and incombination: A principal device, to supply the engine while cruising andaccelerating which is located downstream of the conventional means(carburetor) of atomizing fuel in the intake air stream and which willhave static elements to dry the mixture by centrifugal action resultingfrom its rapid outflow, and also succeeding means of collecting andeventually recycling excess fuel and eliminating entrapped impurities.An auxiliary device whose purpose is to supply the engine, whenthrottled back, which has, besides the conventional means for mixingfuel in prescribed proportions with a small flow of primary air, meansfor heating the mixture, for example by exhaust gasses, and means foradding to the mixture, thus heated a metered flow of fresh secondaryair. A control device consisting first of an accelerating butterfly(valve) capable of tightly shutting off flow between the principaldevice and the intake to the engine, and, secondly, an automaticthree-way valve by which a discharge path downstream of theaforementioned butterfly is selectively connected to the auxiliarydevice, or if the butterfly is closed because the engine speed isgreater than a selected limit, with the engine exhaust.

Another feature of the invention, the principal device consistsessentially of a tubular container provided with an inlet connectionlocated over an outlet connection, arranged coaxially and essentially ofthe same diameter, in which the following elements are located in themainstream of the mixture flow:

A system of elastically flexible blade which imparts a helical flow tothe aforementioned mixture where the pitch of said helical flow variesas a function of the velocity of the mixture.

A conical skirt by which the heavy particles of the mixture areseparated by centrifugal action and An annular trough, which forms acollector, and is located below the lower unattached end of theaforementioned skirt, whose inner rim is attached to the outletconnection.

It can be shown from the foregoing features, that the invention willsupply the engine, under all operating conditions, a combustible mixturewherein the proportion of fuel will be optimum, because whether cruisingor accelerating, the mixture is automatically proportioned by the samefactor, its velocity, which reflects exactly the requirements of theengine, while when idling the engine receives a perfectly dry mixtureproportioned once and for all (the inference here is that theproportioning is in fixed ratio). Otherwise, during periods ofdeceleration, which generally result in the consumption of unburnedfuel, when, in turn, increases the emission of pollutants, the supply tothe engine is completely cut off without affecting the necessary brakingaction which is assured by the partial recycling of the exhaust gasses.

In total, the invention not only reduces considerably the emission ofthe pollutants under all operating requirements of the engine, but againappreciably reduces fuel consumption.

BRIEF DESCRIPTION OF THE DRAWINGS The character of the invention,however, may be best understood by reference to one of its structuralforms, as illustrated by the accompanying drawings, in which:

FIG. 1 is a schematic top view of an internal combustion engine equippedwith anti-pollution device such as this invention,

FIGS. 2, 3 and 4, show respectively, a cross section parallel to themain axis, a cross section'perpendicular to the axis, and an exteriorright hand side view of FIG. 1, and

FIG. 5 shows an electrical schematic drawing of the control circuit.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a top view of aschematic representation of an internal combustion engine, 1, where theintake manifold and the exhaust manifold are respectively shown as 2,and 3. This invention is shown, in essence, as item 10, mounted directlyon the intake flange of the .intake manifold 2, provided with anacceleration control 5, and connected in one place to the exhaustmanifold 3 by a reclaiming tube 6, and in another place by a speedsensitive contact.(electrical) 7 mounted on the end of the generator oralternator shaft 8 by wire 9, with other electric connections withground (electrical) and positive polarity indicated by appropriatesymbols.

Item 10 is shown in detail by the cross sections and side views of FIGS.2, 3 and 4. This item has the overall shape of a short flanged chamberplaced between the conventional simplified carburetor 11 and theintake-flange 12 of the intake manifold. This chamber is made up of acylindrical wall 21 closed atone end by the bottom 22 and attached toflange 12 with a gasket in between and closed at the other end by aremovable cover 23, with gasket, fastened to the flange 24 which formsthe end of wall 21. The body 13 of carburetor 11 is fastened to cover 23by dowels 14. The carburetor venturi 15, furnished with the usualatomizing nozzle 16 discharges into an inlet port 25 located coaxiallyand passing through cover 23. The bottom 22 of the chamber 20 forms intoan inner annular wall 26 making an outlet port 27, located coaxiallywith the inlet port 25 and of essentially same diameter. A butterfly(valve) shaft 28, to which is attached a butterfly valve 29, is locateddiametrically across the outlet port 27, and is rotated by anaccelerator control 5 and is capable of completely closing off theaforementioned port 27.

Essential parts of the principal element ofthis supply device, which arepart of the invention, are located inside the chamber 20 and serve tocorrect the proportioning and clean the combustible mixture coming fromthe carburetor when the engine is cruising or accelerating. This deviceis made up essentially of static elements 30, made up in one part, ofasystem of elastically flexible blades 31 mounted in the inlet passage 25integral with a conical skirt 32, and in another part, of an annulartrough 33 mounted on a rabbet 26 at the inner end of the outlet passagelocated under the free end of skirt 32, these various elements beingmade adantageously of plastic materials.

Going further into detail, the blade system 31 is made up of four radialblades with their leading surfaces fixed in the axial direction andintergral with the upper end of skirt 32 and a central hub, and withtheir trailing surfaces curved to a particular shape. The individualblades 31 of the system are curved identically and in a manner so as toimpart a helical flow to the combustible mixture passing through theinlet 25.

It is one of the essential embodiments of the invention that the freecurved ends of the blade system 31 are elastically flexible and tend todiminish their effectiveness (by changing shape) as the velocity of thecombustible mixture increases. It follows that the mixture is subjectedto a centrifugal action wherein the force (centrifugal) decreases withspeed in accordance with the influence of the blades determined by theirshape and flexibility, which, at the highest speed, arepracticallystraightened out. For example, used like a flag in a highwind" and to have practically no effect on the flow of the mixture.Because of this centrifugal action, the denser particles in thecombustible mixture, such as dust, and other suspended impurities, andglobules of unvaporized fuel are thrown against the skirt 32 and dripdown the wall of the skirt eventually falling into the gutter 33 whichserves as a collector. The rim of the gutter is gradually sloped and theheavy particles which have been collected fall into the annulardepression 34 formed by the end 22 of the chamber 21 which serves as atemporary storage area. in effect, the annular space surrounding theskirt 32 forms a low pressure, slow-down chamber, which prevents theinduction into the engine of the heavy particles in the combustiblemixture which have been collected in the reservoir 34.

These heavy particles can be retrieved and recycled in several ways:thus the reservoir 34 can be directly connected to an orifice 17 locatedin the throat of the venturi 15 by means of a siphon tube 36, whichbrings about an almost instantaneous recycling of the collected fuel. Inthis way the same torque can be obtained with less pressure on theaccelerator, which results in fuel economy without sacrifice inperformance. Recycling of the collected fuel can just as well bedeferred, in which case the reservoir 34 is connected by a siphon tube37 which terminates at the bottom of a closed receptacle 38 in which theupper space is connected to the orifice of 37 by an intake tube 39 whichis capped with a filter or strainer. The fuel collected in thereceptacle 38 can be reused directly by the carburetor 11 as soon as itslevel reaches the inlet of the intake tube 39. Preferably, this fuel isalways returned to the reservoir after being filtered which preventsfaulting of the carburetor. When the engine is throttled down, theaccelerator pedal, completely released, closes the discharge port 27 bymeans of the butterfly valve 29 so that the principal supply device isinoperative. In this condition, and in conjunction with anotheressential part of the invention, the combustible mixture supplied to theengine is processed by an auxiliary supply device 40 described in thefollowing.

This auxiliary device consists of a chamber 41 in a horizontalprotuberance 42 emerging from the wall of chamber 20, normally connectedby a passage 43 leading from an orifice 44 located in the discharge port27 downstream of the closed butterfly 29. in another way chamber 41 isconnected on the one hand to atmosphere through secondary air nozzel 45and on the other hand by a port 46 located in the horizontalprotuberance 42 with the port partially closed off by a regulating screw47. The outlet end of port 46 is connected by tubing 48 to an inletconnection 18 which leads to the regular low speed nozzle in carburetor11. The length of this tubing 48 is heated, either by coiling it severaltimes around tube 6, which is connected to the exhaust manifold, or byan electric heating element represented symbolically by resistance 49'.

The auxiliary supply device, constructed in this fashion, functions asfollows. The low speed nozzle in carburetor 11, is designed to handle avery rich mixture. Thismixture is first heated by coil 49 or resistance49' to a temperature high enough to completely vaporize the fuel. Theregulating screw 47 allows adjustment of the small flow of hot gaseousmixture, thus obtained, to which a supply of relatively important freshsecondary air is added by means of the nozzle 45 to provide a low speedintake mixture which is supplied to the engine through chamber 41,passage 43, and orifice 44 located under the closed butterfly 29. Thusthe engine receives a combustible mixture free from all liquid particlesand will turn over smoothly and without emitting pollutants. Risk ofcondensed fuel in the intake is practically eliminated. When the engineis running at cruising speed or accelerating, the idling mixturefurnished by auxiliary device 40 is not cut off but merely reducedbecause of the relative decrease in vacuum in the intake manifold 2.This is never a problem because the auxiliary supply device furnishes alimited supply of 5 combustible mixture which is purely gaseous. On thecontrary, and in accordance with another important feature of theinvention, the supply of idling mixture is completely cut off duringperiods of abrupt deceleration, that is, when the butterfly 29 is closedand the engine is turning up at considerably faster than idle speed.This cut off of the combustible mixture to the engine duringdeceleration, very helpful in reducing the emission of pollutant, isbrought about by an electromagnetic control device 50 which is describedin the following. This device 50 consists essentially of anelectromagnet 51 mounted at one end of protuberance 42 on the wall ofchamber and where the armature 52 held in one position by a returnspring 53 is connected by a shaft 54 to a sliding valve 55 in a bore orcylinder 56 which is built in between chamber 41 and the tip of theexhaust gas return tube 6. This bore 56 forms a valve chamber with acentral port which is the end of passage 43 which terminates at theother end in orifice 44 and where the opposite ends of the valvechamberconnect to chamber 41 and tube 6 by means of cut-off seats 57 and58, the latter formed by milling the end of tube 6.

As shown in circuit diagram FIG. 5, the electromagnet 51 can beenergized by a control circuit 60 consisting of two open contacts 61 and62 respectively actuatcd by the speed sensitive switch 7 and theaccelerator control arm 5. These contacts are in the series with relaycoil 63 and form a circuit from the positive battery terminal to ground.Contact 64 is closed by energization of coil 63 and applies batteryvoltage to the electromagnet 51 from positive battery through 51 toground. The speed sensitive device 7, centrifugal type, for example,closes contact 61 when motor speed is above a preselected limit, higherthan idle speed, for example, 1500 RPM. Accelerator control arm 5 closescontact 62 when the butterfly 29 of the principal supply device 20 isclosed. Consequently, this contact is conveniently located near the endof the shaft 28 of butterfly 29, under a box 66 in which relay 63-64 canalso be enclosed. According to the previous description, device 50 is a3 way electric valve by which the intake manifold 2 is selectively cutoff from the auxiliary supply device 40 and connected to the exhaust gassampling tube 6 when the engine is turning over fast enough and when thebutterfly of the principal feed device is closed. By the combined actionof the electrically operated valve and the butterfly, all fuel supply iscut off during deceleration which obviously eliminates all emission ofpollutants but this does not impair the engines braking ability becausethe exhaust is connected to the intake thereby providing the compressionnecessary for braking.

It should be understood the invention is not limited to the method ofoperation described and illustrated here which is simply oneillustration. In fact this method of application could be modified andadapted with considerable latitude without departing from the frame workof the invention. More particularly, the

. 6 three way valve could be controlled with electronic logic usingother centrifugal sensors for speed signals possibly pneumatic orhydraulic. The combustimble mixtures could be handled by means otherthan a carburetor. The gathering up of exhaust gases could be done atthe collector.

It is obvious that minor changes may be made in the form andconstruction of the invention without departing from the material spiritthereof. It is not, however, desired to confine the invention to theexact form herein shown and described, but it is desired to include allsuch as properly come within the scope claimed.

The invention having thus been described, what is claimed as new anddesired to secure by Letters Patent 15:

1. Apparatus for supplying a combustion mixture to an internalcombustion engine, particularly an automobile engine, subject toanti-pollution regulations comprising:

a. a principal device designed to supply the engine, while cruising andaccelerating, which has located downstream of the conventional means ofatomizing fuel in the intake air to the motor, static elements to drythe intake mixture by centrifugal action due to the velocity of flow,and subsequent means to collect and eventually recycle excess fuel andeliminate collected impurities,

b. an auxiliary device designed to supply the engine,

when idling, which contains, in addition to the conventional means ofproportioning a mixture of fuel with a small flow of primary air, meansof heating the mixture, and of adding to the heated mixture a meteredamount of fresh secondary air, and

c. a control device consisting, in one part of an accelerating butterflycapable of closing off the principal device from the intake to theengine and in another part of an automatic three way valve by which apassage discharging downstream of the aforementioned butterfly isselectively connected to the auxiliary device when the butterfly is notclosed, and when the butterfly is closed, and the speed of the engine isabove a predetermined limit, to the exhaust of said engine.

2. Apparatus as recited in claim 1, wherein the conventional means ofatomizing the fuel in the intake air which is associatedwith theprincipal device contains a nozzle located in the center of the venturithroat and usually supplied from constant level reservoir, and wouldresemble a simplified classic carburetor.

3. Apparatus as recited in claim 1, wherein the principal deviceconsists essentially of a tubular chamber with an upper entry portconnection, and a lower exit port connection located coaxially andessentially of the same diameter and located in the center of the deviceand in which are located in the path of the incoming mixture:

a. a system of elastically flexible blades which impart a helical flowto the aforementioned mixture wherein the pitch of the helix variesdirectly as the speed,

b. a conical skirt by which heavy particles in the mixture are trappedby centrifugal action, and

c. an annular gutter which forms a collector and is located under thelower free end of the aforementioned skirt and in which the inner rimsforms part of the exit port.

4. Apparatus as recited in claim 3 wherein the exit port is integralwith the bottom of the chamber and forms a long interior wall whichsupports the gutter, so that the inlet is made up of a removable coversupporting' the blade system, and the skirt, around which is formed atranquilization chamber.

5. Apparatus as recited in claim 4 wherein the end of the chamber formsan annular reservoir in which the heavy particles in the mixture,collected in the gutter are received prior to being taken away.

6. Apparatus as recited in claim 4 wherein the butterfly is located inthe exit port and its shaft is located along a diameter of the port.

7. Apparatus as recited in claim 1 wherein the chamber of the principaldevice is a short flanged cylinder mounted directly on the inlet flangeof the intake manifold of the engine.

8. Apparatus as recited in claim 1 wherein the previously mentionedvalve consists essentially of a cylindrical chamber in the horizontalwall in which is an orifice connected to a previously mentioned passageand wherein the extremities (of the valve chamber) form two cut-offseats, the first leading to the chamber receiving the gaseous mixtureconditioned in the auxiliary device, and the second leading to a tubeconnected to the engine exhaust, one of the aforementioned seats beingselectively blocked off by a piston which moves axially in the valvechamber.

9. Apparatus as recited in claim 8 wherein the previ ously cited pistonis normally held against the second cut-off seat by a return spring, andis moved against the first cut-off seat only when the butterfly isclosed and when the motor speed is above a preselected limit.

10. Apparatus as recited in claim 8 wherein the auxil iary device isintegeral with the valve and consists essentially of a heating method,several coils of a prementioned tube, and connected to a dischargepassage in the previously mentioned chamber and input nozzle for entryof secondary air which connects the chamber with the atomosphere.

11. Apparatus as recited in claim 10 wherein the previously mentionedpassage can be partially closed off by a regulating means.

12. Apparatus as recited in claim 8 wherein the body of the previouslymentioned valve is formed in the horizontal protuberance emenating fromthe chamber of I the principal device.

13. Apparatus as recited in claim 1 wherein the previously mentionedvalve is operated by an electromagnet energized by the simultaneousclosing of a contact actuated by the butterfly and of a speed sensitiveswitch previously cited.

14. Apparatus as recited in claim 6 wherein the previously mentionedcontact is mounted on the principal device, near the end of thebutterfly valve shaft.

15. Apparatus as recited in claim 9 wherein the previously mentionedelectro-magnet solenoid type, is mounted at the end of the valve body.

16. Apparatus as recited in claim 13 wherein the previously mentionedspeed sensitive is of the centrifugal type and mounted on the end of theengine shaft, or on an auxiliary motor such as a generator oralternator.

17. Method of supplying an internal combustion engine, particularly anautomobile engine, subject to the anti-pollution regulations, comprisingthe steps of,

a. while the automobile is cruising and accelerating,

furnishing the engine with a dry combustible mixture, automaticallyproportioned, arrived at by atomizing the fuel in the air intake of theengine, and drying the mixture thus obtained by centrifuga] action dueto its speed, with reclamation and eventual recycling of excess fuel,and elimination of collected impurities,

b. while the engine is idling, furnishing only a combustible gaseousmixture, separately derived by mixing the fuel in predeterminedproportions with a small flow of primary air, then heating the mixture,and finally introducing a metered flow of secondary air, and

c. while the automobile is decelerating cutting off the combustiblemixture to the engine while the intake is by-passed to the exhaust.

1. Apparatus for supplying a combustion mixture to an internalcombustion engine, particularly an automobile engine, subject toanti-pollution regulations comprising: a. a principal device designed tosupply the engine, while cruising and accelerating, which has locateddownstream of the conventional means of atomizing fuel in the intake airto the motor, static elements to dry the intake mixture by centrifugalaction due to the velocity of flow, and subsequent means to collect andeventually recycle excess fuel and eliminate collected impurities, b. anauxiliary device designed to supply the engine, when idling, whichcontains, in addition to the conventional means of proportioning amixture of fuel with a small flow of primary air, means of heating themixture, and of adding to the heated mixture a metered amount of freshsecondary air, and c. a control device consisting, in one part of anaccelerating butterfly capable of closing off the principal device fromthe intake to the engine and in another part of an automatic three wayvalve by which a passage discharging downstream of the aforementionedbutterfly is selectively connected to the auxiliary device when thebutterfly is not closed, and when the butterfly is closed, and the speedof the engine is above a predetermined limit, to the exhaust of saidengine.
 2. Apparatus as recited in claim 1, wherein the conventionalmeans of atomizing the fuel in the intake air which is associated withthe principal device contains a nozzle located in the center of theventuri throat and usually supplied from constant level reservoir, andwould resemble a simplified classic carburetor.
 3. Apparatus as recitedin claim 1, wherein the principal device consists essentially of atubular chamber with an upper entry port connection, and a lower exitport connection located coaxially and essentially of the same diameterand located in the center of the device and in which are located in thepath of the incoming mixture: a. a system of elastically flexible bladeswhich impart a helical flow to the aforementioned mixture wherein thepitch of the helix varies directly as the speed, b. a conical skirt bywhich heavy particles in the mixture are trapped by centrifugal action,and c. an annular gutter which forms a collector and is located underthe lower free end of the aforementioned skirt and in which the innerrims forms part of the exit port.
 4. Apparatus as recited in claim 3wherein the exit port is integral with the bottom of the chamber andforms a long interior wall which supports the gutter, so that the inletis made up of a removable cover supporting the blade system, and theskirt, around which is formed a tranquilization chamber.
 5. Apparatus asrecited in claim 4 wherein the end of the chamber forms an annularreservoir in which the heavy particles in the mixture, collected in thegutter are received prior to being taken away.
 6. Apparatus as recitedin claim 4 wherein the butterfly is located in the exit port and itsshaft is located along a diameter of the port.
 7. Apparatus as recitedin claim 1 wherein the chamber of the principal device is a shortflanged cylinder mounted directly on the inlet flange of the intakemanifold of the engine.
 8. Apparatus as recited in claim 1 wherein thepreviously mentioned valve consists essentially of a cylindrical chamberin the horizontal wall in which is an orifice connected to a previouslymentioned passage and wherein the extremities (of the valve chamber)form two cut-off seats, the first leading to the chamber receiving thegaseous mixture conditioned in the auxiliary device, and the secondleading to a tube connected to the engine exhaust, one of theaforementioned seats being selectively blocked off by a piston whichmoves axially in the valve chamber.
 9. Apparatus as recited in claim 8wherein the previously cited piston is normally held against the secondcut-off seat by a return spring, and is moved against the first cut-offseat only when the butterfly is closed and when the motor speed is abovea preselected limit.
 10. Apparatus as recited in claim 8 wherein theauxiliary device is integeral with the valve and consists essentially ofa heating method, several coils of a prementioned tube, and connected toa discharge passage in the previously mentioned chamber and input nozzlefor entry of secondary air which connects the chamber with theatomosphere.
 11. Apparatus as recited in claim 10 wherein the previouslymentioned passage can be partially closed off by a regulating means. 12.Apparatus as recited in claim 8 wherein the body of the previouslymentioned valve is formed in the horizontal protuberance emenating fromthe chamber of the principal device.
 13. Apparatus as recited in claim 1wherein the previously mentioned valve is operated by an electro-magnetenergized by the simultaneous closing of a contact actuated by thebutterfly and of a speed sensitive switch previously cited. 14.Apparatus as recited in claim 6 wherein the previously mentioned contactis mounted on the principal device, near the end of the butterfly valveshaft.
 15. Apparatus as recited iN claim 9 wherein the previouslymentioned electro-magnet solenoid type, is mounted at the end of thevalve body.
 16. Apparatus as recited in claim 13 wherein the previouslymentioned speed sensitive is of the centrifugal type and mounted on theend of the engine shaft, or on an auxiliary motor such as a generator oralternator.
 17. Method of supplying an internal combustion engine,particularly an automobile engine, subject to the anti-pollutionregulations, comprising the steps of, a. while the automobile iscruising and accelerating, furnishing the engine with a dry combustiblemixture, automatically proportioned, arrived at by atomizing the fuel inthe air intake of the engine, and drying the mixture thus obtained bycentrifugal action due to its speed, with reclamation and eventualrecycling of excess fuel, and elimination of collected impurities, b.while the engine is idling, furnishing only a combustible gaseousmixture, separately derived by mixing the fuel in predeterminedproportions with a small flow of primary air, then heating the mixture,and finally introducing a metered flow of secondary air, and c. whilethe automobile is decelerating cutting off the combustible mixture tothe engine while the intake is by-passed to the exhaust.